Live histogram puzzle

Why is it that Fuji chose to to allow shifting of the live histogram in exposure compensation, but not in manual exposure? I can (sort of) understand that Fuji would keep the histogram centered in S, A and P modes since this would represent the processors best guess at centering. Even that is a bit questionable is you take S and A modes outside of their "comfort" range. Any chance Fuji might offer a firmware update to allow more use of the histogram?